I understand the reason for having 0 value diplomat counters in the board game, but I don't think they are needed in the computer version.
Suggested fix:
- Eliminate 0 value diplomat counters.
- Don't show enemy diplomat counters on the map or in the diplomacy window.
- Don't show the message about where enemy diplomats have been sent.
This would eliminate counter clutter, as well as decrease the complexity of the AI by a little bit.